Solar collector



FIG. 1 is a perspective view of a solar collector showing my new design;

FIG. 2 is a front elevation view thereof, the rear elevation being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a left side view thereof, the right side view being a mirror image.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for solar collector, as shown and described. 